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(a) Mean (±SEM) pre-CS, and CS-elicited, freezing for groups metestrus (n=9), proestrus (n=10), and RU486 (n=11) during extinction training in experiment 3. (b) Mean (±SEM) pre-CS, and CS-elicited, freezing for groups during test for extinction recall in experiment 3. *Proestrus and RU486<metestrus (P<0.05).
